Align Kubernetes ports with Docker Compose configuration

- Frontend: Changed NodePort from 30080 to 3000 (matches Docker port)
- Backend: Changed NodePort from 30081 to 5001 (matches Docker port)
- Keycloak: Changed NodePort from 30082 to 8080 (matches Docker port)
- Updated ConfigMap URLs to use new ports
- Updated NEXTAUTH_URL to use port 3000

This ensures Kubernetes deployment uses the same ports as Docker Compose
for consistency across environments.

infra/k8s/base/frontend-service.yaml

@@ -11,7 +11,7 @@ spec:
     app: workclub-frontend
   ports:
   - name: http
-    port: 80
+    port: 3000
     targetPort: 3000
-    nodePort: 30080
+    nodePort: 3000
     protocol: TCP